<template>
  <div class="login">
    <div class="main">
      <h2 class="title">ZeroX科技智能OA系统®</h2>
      <el-form
        ref="loginFormRef"
        v-loading="loading"
        element-loading-text="正在登录..."
        element-loading-spinner="el-icon-loading"
        element-loading-background="rgba(0, 0, 0, 0.8)"
        class="login-form"
        :model="loginForm"
        :rules="loginRules"
      >
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            type="text"
            prefix-icon="iconfont icon-yonghu"
            auto-complete="off"
            placeholder="账号"
          />
        </el-form-item>
        <el-form-item prop="password" v-if="visiblePwd">
          <el-input
            v-model="loginForm.password"
            type="password"
            prefix-icon="iconfont icon-mima"
            auto-complete="off"
            placeholder="密码"
          >
            <i
              slot="suffix"
              title="显示密码"
              style="cursor:pointer;"
              class="iconfont icon-yanjing_yincang"
              @click="changePass('show')"
            />
          </el-input>
        </el-form-item>
        <el-form-item prop="password" v-else>
          <el-input
            v-model="loginForm.password"
            prefix-icon="iconfont icon-mima"
            auto-complete="off"
            placeholder="密码"
          >
            <i
              slot="suffix"
              title="隐藏密码"
              style="cursor:pointer;"
              class="iconfont icon-yanjing_xianshi"
              @click="changePass('hide')"
            />
          </el-input>
        </el-form-item>
        <el-form-item prop="code">
          <el-input
            v-model="loginForm.captcha"
            prefix-icon="iconfont icon-yanzhengma"
            auto-complete="off"
            placeholder="验证码"
            style="width: 58%"
          />
          <div class="login-code">
            <img :src="captchaUrl" class="login-code-img" @click="updateCaptcha">
          </div>
        </el-form-item>
        <el-checkbox v-model="loginForm.rememberMe" style="margin:0px 0px 25px 0px;">记住密码</el-checkbox>
        <el-form-item style="width:100%;">
          <el-button
            size="medium"
            type="primary"
            style="width:100%;"
            @click="submitLogin"
          >登 录
          </el-button>
        </el-form-item>
      </el-form>
    </div>
    <!--  底部  -->
    <div class="el-login-footer">
      <span>Copyright © 2019-2022 ZeroX科技 All Rights Reserved.</span>
    </div>
  </div>
</template>

<script>
// 导入阿里巴巴矢量图样式表
import '../../assets/fonts/iconfont.css'
import {getCaptcha, getInfo, login} from '@/api/user'
export default {
  name: 'Login',
  data() {
    // 这里存放数据
    return {
      // 这里请求后端接口/captcha来获取验证码，另外还要带上时间参数，为什么要带上时间参数。
      // 因为如果验证码看不清，需要手动点击更换验证码，如果不加时间参数，在点击时获取到的还是同一张验证码。
      // 它会认为你是调用同一个接口，传的是同一个参数，就会把上次图形进行返回。加上时间参数会确保能够请求到
      // 新的验证码图片。
      captchaUrl: '/captcha?time=' + new Date(),
      loginForm: {
        username: 'admin', // 用户名
        password: '123456', // 密码
        rememberMe: false, // 记住我
        captcha: '', // 验证码
        uuid: '', //存放在缓存中验证码的key
      },
      visiblePwd: true,
      loginRules: {
        username: [
          { required: true, trigger: 'blur', message: '用户名不能为空' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, trigger: 'blur', message: '密码不能为空' },
          { min: 3, max: 15, message: '长度在 3 到 15 个字符', trigger: 'blur' }
        ],
        captcha: [{ required: true, trigger: 'blur', message: '验证码不能为空' }]
      },
      // false表示不是正在加载中，true表示正在加载中
      loading: false
    }
  },
  watch: {
  },
  created() {
    //获取验证码
    this.updateCaptcha()
  },
  methods: {
    // 显示密码
    changePass(value) {
      this.visiblePwd = !(value === 'show')
    },
    // 验证码图片的点击事件，实现更新验证码图片
    updateCaptcha() {
      getCaptcha().then(response => {
        this.captchaUrl = `data:image/gif;base64,${response.img}`
        this.loginForm.uuid=response.uuid
        this.loginForm.captcha=''
        console.log(response)
      })
    },
    // 登录提交
    submitLogin() {
      this.$refs.loginFormRef.validate(valid => {
        if (valid) {
          this.loading = true
          this.$store.dispatch('user/login', this.loginForm).then(() => {
            // {path: this.redirect || '/'} 这种是函数参数默认值，判断this.redirect是否为空
            // 如果是空的，给默认值 '/'
            this.$router.push({ path: this.redirect || '/' })
            this.loading = false
          }).catch((error) => {
            console.log(error)
            this.loading = false
          })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  /* height: 705px;*/
  background: url("../../assets/images/login-background.jpg") no-repeat;
  background-size: 100% 100%;
  position: relative;
}
.main {
  position: absolute;
  height: 50%;
  top: 19%;
  right: 10%;
}
.title {
  margin: 0px auto 30px auto;
  text-align: center;
  color: #fff;
}

.login-form {
  background-image: url("../../assets/images/background_login.png");
  background-size: 100% 100%;
  border-radius: 6px;
  width: 340px;
  padding: 45px;
}
.login-form .el-checkbox {
  color: #fff;
  float: left;
  padding-left: 4px;
}
.input-icon {
  height: 39px;
  width: 14px;
  margin-left: 2px;
}
.login-form .el-input {
  height: 38px;
}
.login-form .login-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}
.show-pwd {
  position: absolute;
  right: 10px;
  top: 7px;
  font-size: 16px;
  color: gray;
  cursor: pointer;
  user-select: none;
}
// .login-form input {
/*使用/deep/ ，两边要加空格，来做样式穿透，来提高此样式的优先级别*/
.el-input /deep/ .el-input__inner{
  background: #597277;
  height: 38px;
  color: #fff;
}
.login-code {
  width: 39%;
  height: 38px;
  float: right;
}
.login-code img {
  cursor: pointer;
  vertical-align: middle;
}
.el-login-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #fff;
  font-family: Arial;
  font-size: 12px;
  letter-spacing: 1px;
}
.login-code-img {
  height: 38px;
}
</style>
